Ubuntu Manpage: tixComboBox - Create and manipulate tixComboBox widgets

NAME

       tixComboBox - Create and manipulate tixComboBox widgets

SYNOPSIS

       tixComboBox pathName ?options?

SUPER-CLASS

       The  TixComboBox  class  is  derived  from  the  TixLabelWidget class and inherits all the
       commands, options and subwidgets of its super-class.

STANDARD OPTIONS

       TixComboBox supports all the standard options of  a  frame  widget.   See  the  options(n)
       manual entry for details on the standard options.

WIDGET-SPECIFIC OPTIONS

[-anchor anchor] Specifies how the string inside the entry subwidget should be aligned.
Only the values "w" or "e" are allowed. When set the "w", the entry is aligned to its
beginning. When set to "e", it is aligned to its end. [-arrowbitmap arrowBitmap]
Specifies the bitmap to be used in the arrow button beside the entry widget. The default
is an downward arrow bitmap in the file $tix_library/bitmaps/cbxarrow
[-browsecmd browseCmd] Specifies the command to be called when the user browses through
the listbox. This command can be used to provide instant feedback when the user examines
items in the listbox before committing a choice. [-command command] Specifies the command
to be called when the ComboBox is invoked or when the -value of the ComboBox is changed.
[-crossbitmap crossBitmap] Specifies the bitmap to be used in the "cross" button to the
left of the entry widget. The default is a bitmap in the file $tix_library/bitmaps/cross
[-disablecallback disableCallback] A boolean value indicating whether callbacks should be
disabled. When set to true, the TCL command specified by the -command option is not
executed when the -value of the ComboBox. changes.
[-disabledforeground disabledforeground] Specifies the foreground color to be used when
the ComboBox is disabled. [-dropdown dropdown] A Boolean value specifying the style of
the ComboBox. When set to "true", the listbox is only displayed temporarily when the arrow
button is pressed. When set to "false", the listbox is always displayed.
[-editable editable] Specifies whether the user is allowed to type into the entry
subwidget of the ComboBox. [-fancy fancy] A Boolean value specifying whether the cross
and tick button subwidgets should be shown. [-grab grab] Specifies the pointer grabbing
policy when the listbox is popped up. Only values "global", "local" or "none" are
allowed. By default global grab is used. However, when you are developing your
application, you may want to use only local grabbing so that in the event of errors, your
X display won't be locked up.

Name: historyLimit
Class: historyLimit
Switch: -historylimit
Alias: -histlimit

Specifies how many previous user inputs can be stored in the history list.
[-history history] A Boolean value specifying whether previous user inputs should
be stored in the history list. [-label label] Specifies the string to display as
the label of this ComboBox widget. [-labelside labelSide] Specifies where the
label should be displayed relative to the entry subwidget. Valid options are: top,
left, right, bottom, none or acrosstop. [-listcmd listCmd] Specifies a TCL command
to be called every time when the listbox pops up. This option allows you to fill up
the listbox on-demand. This option is ignored when the listbox is not in the
dropdown style. [-listwidth listWidth] If set, this option controls the width of
the listbox subwidget when it is popped up. The option is ignored when the listbox
is not in the dropdown style. [-prunehistory prunehistory] Specifies whether
duplicated previous user inputs should be pruned from the the history list. Only
Boolean values are allowed. [-selection selection] Contains the selection in the
ComboBox (the string displayed in the entry subwidget). Depending on the
-selectmode, the selection of a ComboBox may be different than its -value.
[-selection selection] This option stores the temporary selection. When the user
types in a text string inside the entry widget, that string is considered as a
temporary input and is stored inside the -selection option. The -value option is
updated only when the user presses the return key. [-selectmode selectMode]
Specifies the how the combobox responds to the mouse button events in the listbox
subwidget; can eithet be "browse" or "immediate". The default -selectmode is
"browse". See the BINDINGS section below. [-state state] Specifies the whether the
ComboBox is normal or disabled. Only the values "normal" and "disabled" are
recognized. [-tickbitmap tickBitmap] Specifies the bitmap to be used in the "tick"
button to the left of the entry widget. The default is a bitmap in the file
$tix_library/bitmaps/tick [-validatecmd validateCmd] Specifies a TCL command to be
called when the -value of the ComboBox is about to change. This command is called
with one parameter -- the new -value entered by the user. This command is to
validate this new value by returning a value it deems valid. [-value value]
Specifies the string to be displayed in the entry subwidget of the ComboBox. When
queried, the returned value is the last value selected by the user. When the -value
option is changed as a result of the config -value widget command, the TCL command
specified by the -command option is called. [-variable variable] Specifies the
global variable in which the value of the ComboBox should be stored. The value of
the ComboBox will be automatically updated when this variable is changed.

SUBWIDGETS

       Name:          arrow
       Class:         Button

              The down arrow button.

       Name:          cross
       Class:         Button

              The cross button. Available only when -fancy is set.

       Name:          entry
       Class:         Entry

              The entry that shows the value of this tixControl.

       Name:          label
       Class:         Label

              The label subwidget.

       Name:          listbox
       Class:         Listbox

              The listbox that holds all the list entries.

       Name:          slistbox
       Class:         TixScrolledListBox

              The scrolled-listbox that provides the scrollbars.

       Name:          tick
       Class:         Button

              The tick button. Available only when -fancy is set.

DESCRIPTION

       The tixComboBox command creates a new window (given by the pathName argument) and makes it
       into a tixComboBox widget.  Additional options, described above, may be specified  on  the
       command  line  or  in the option database to configure aspects of the ComboBox such as its
       cursor and relief.

       The Tix ComboBox widget is similar to the combo box control in MS Windows.  The  user  can
       select  a  choice  by  either  typing  in the entry subwdget or selecting from the listbox
       subwidget.

WIDGET COMMANDS

The tixComboBox command creates a new Tcl command whose name is the same as the path name
of the ComboBox's window. This command may be used to invoke various operations on the
widget. It has the following general form:
pathName option ?arg arg ...?
PathName is the name of the command, which is the same as the ComboBox widget's path name.
Option and the args determine the exact behavior of the command. The following commands
are possible for ComboBox widgets:

pathName addhistory string
Add the string to the beinning of the listbox.

pathName appendhistory string
Append the string to the end of the listbox.

pathName cget option
Returns the current value of the configuration option given by option. Option may
have any of the values accepted by the tixComboBox command.

pathName configure ?option? ?value option value ...?
Query or modify the configuration options of the widget. If no option is
specified, returns a list describing all of the available options for pathName (see
Tk_ConfigureInfo for information on the format of this list). If option is
specified with no value, then the command returns a list describing the one named
option (this list will be identical to the corresponding sublist of the value
returned if no option is specified). If one or more option-value pairs are
specified, then the command modifies the given widget option(s) to have the given
value(s); in this case the command returns an empty string. Option may have any of
the values accepted by the tixComboBox command.

pathName flash index string
Flashes the ComboBox. flash is usually called by a -command procedure to
acknowledge to the user that he has selected a value for the ComboBox.

pathName insert index string
Insert the string into the listbox at the specified index. index must be a valid
listbox index.

pathName pick index
Set the (index)th item in the listbox to be the current value of the ComboBox. As a
result, the value of the ComboBox is changed and the TCL command specified by the
-command option will be called.

pathName subwidget name ?args?
When no options are given, returns the pathname of the subwidget of the specified
name.

When options are given, the widget command of the specified subwidget will be
called with these options.

BINDINGS

       [1]    If  the  -selectmode is "immediate", when the user enters a keystroke, clicks on an
              item or drags the mouse pointer in the listbox, the -value of the ComboBox will  be
              immediately set to this item and the -command procedure will be called.

       [2]    If the -selectmode is "browse", when the user enters a keystroke, clicks on an item
              or drags the mouse pointer in the listbox, the -selection of the ComboBox  will  be
              immediately  set  to  the  new  content of the entry subwidget; also the -browsecmd
              procedure will be called. The -value option will be  changed  only  when  the  user
              invokes  the  ComboBox (see [3] below). If the user presses the <Escape> key at any
              time, any new -selection will be ignored and the text inside  the  entry  subwidget
              will be restored to the current -value of the ComboBox.

       [3]    If  the -dropdown option is true, the user can invoke the ComboBox by releasing the
              left mouse button over the desired item in the listbox. If the -dropdown option  is
              false, the user can invoke the ComboBox by double-clicking over the desired item in
              the listbox. In both cases, the user can also invoke the listbox  by  pressing  the
              <Return>  or  <Tab> key inside the entry subwidget, or switching the input focus to
              another widget inside the same toplevel widget

BUGS

       Starting from Tix vetsion 4.0, the default -value of the ComboBox is the empty string.  If
       you  want  the  ComboBox to show a string by default, you must configure its -value option
       explicitly.

KEYWORDS

       Tix(n), ComboBox(n), listbox(n)